/Engine/Source/Runtime/Engine/Public/AudioDevice.h
void SetSoundMixModifiers ( const [TMap](API\Runtime\Core\Containers\TMap)< [USoundMix](API\Runtime\Engine\Sound\USoundMix) *, [FSoundMixState](API\Runtime\Engine\FSoundMixState) > & InSoundMixModifiers, const [TArray](API\Runtime\Core\Containers\TArray)< [USoundMix](API\Runtime\Engine\Sound\USoundMix) * > & InPrevPassiveSoundMixModifiers, [USoundMix](API\Runtime\Engine\Sound\USoundMix) * InDefaultBaseSoundMix )